EP 0110492 A2 19840613 - Improved fusible element for a current-limiting fuse having groups of spaced holes or notches therein.
Title (en)
Improved fusible element for a current-limiting fuse having groups of spaced holes or notches therein.
Title (de)
Schmelzelement für eine Strombegrenzungssicherung mit Gruppen von auseinanderliegenden Lochungen oder Einschnitten in dem Element.
Title (fr)
Elément fusible pour fusible de limitation du courant avec des groupes de trous ou d'encoches espacés dans l'élément.
Publication
Application
Priority
US 43777682 A 19821029
Abstract (en)
57 A fusible element for a current-limiting fuse comprises a metal ribbon having groups of holes therethrough and therealong. The distance along the ribbon between adjacent holes in a group is less than the distance along between adjacent groups. The lateral width of the ribbon between the hole groups is greater than its laterial width where the holes are located. The ribbon initially melts at the holes and multiple arcs burn back the ribbon at a first rate until the ribbon containing the holes is consumed, following which merger of the arcs occurs. This merger and the greater width of the ribbon between the groups results in burn-back of the ribbon at a second reduced rate. In this way, both 9 kv and 15 kv fault currents may be interrupted without exceeding the spark-over voltage of phase-to-ground arrestors when 9 kv fault currents are interrupted.
IPC 1-7
IPC 8 full level
H01H 85/10 (2006.01)
CPC (source: EP US)
H01H 85/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0110492 A2 19840613; EP 0110492 A3 19840718; EP 0110492 B1 19861217; AT E24366 T1 19870115; CA 1196942 A 19851119; DE 3368480 D1 19870129; US 4481495 A 19841106
DOCDB simple family (application)
EP 83303618 A 19830623; AT 83303618 T 19830623; CA 439037 A 19831014; DE 3368480 T 19830623; US 43777682 A 19821029